package com.tjsiqi.util;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.time.Year;

//计算时间差
public class DateDiff {

    public static Long dateDiff(String startTime, String endTime,  String format, String str) {
        // 按照传入的格式生成一个simpledateformate对象
        SimpleDateFormat sd = new SimpleDateFormat(format);
        long nd = 1000 * 24 * 60 * 60;// 一天的毫秒数
        long nh = 1000 * 60 * 60;// 一小时的毫秒数
        long nm = 1000 * 60;// 一分钟的毫秒数
        long ns = 1000;// 一秒钟的毫秒数
        long diff;
        long day = 0;
        long hour = 0;
        long min = 0;
        long sec = 0;
        // 获得两个时间的毫秒时间差异
        try {
            diff = sd.parse(endTime).getTime() - sd.parse(startTime).getTime();
            day = diff / nd;// 计算差多少天
            hour = diff % nd / nh + day * 24;// 计算差多少小时
            min = diff % nd % nh / nm + day * 24 * 60;// 计算差多少分钟
            sec = diff % nd % nh % nm / ns;// 计算差多少秒
            // 输出结果
            System.out.println("时间相差：" + day + "天" + (hour - day * 24) + "小时"
                    + (min - day * 24 * 60) + "分钟" + sec + "秒。");
            System.out.println("hour=" + hour + ",min=" + min);
            if (str.equalsIgnoreCase("h")) {
                return hour;
            } else if(str.equalsIgnoreCase("d")){
                return day;
            }else {
                return Math.abs((day*24*60)+(hour*60)+min);
            }

        } catch (ParseException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        if (str.equalsIgnoreCase("h")) {
            return hour;
        } else {
            return Math.abs(min);
        }
    }

    public static void main(String[] args) {
       Long lo =  dateDiff("08-02 11:22","08-02 12:22","MM-dd HH:mm","");
        System.out.println(lo);
    }
//    时间相差：0天-9小时0分钟0秒。18375720000 18408120000
//    hour=-9,min=0
//            -540
}
